feat: HMAC verification for web widget (#1643)

* feat: HMAC verification for web widget. Let you verify the authenticated contact via HMAC on the web widget to prevent data tampering.
* Add docs for identity-validation

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/javascript/widget/store/modules/specs/conversation/actions.spec.js

@@ -1,5 +1,5 @@
 import { playNotificationAudio } from 'shared/helpers/AudioNotificationHelper';
-import { actions } from '../../conversation';
+import { actions } from '../../conversation/actions';
 import getUuid from '../../../../helpers/uuid';
 import { API } from 'widget/helpers/axios';
 
@@ -121,4 +121,11 @@ describe('#actions', () => {
       expect(commit.mock.calls).toEqual([]);
     });
   });
+
+  describe('#clearConversations', () => {
+    it('sends correct mutations', () => {
+      actions.clearConversations({ commit });
+      expect(commit).toBeCalledWith('clearConversations');
+    });
+  });
 });